砂蠟物理性質(zhì)及其破壞形式研究
發(fā)布時間：2018-09-14 19:02
【摘要】：通過研究不同配比情況下砂蠟混合物標準樣的單軸壓縮實驗,測定分析了其力學特性,并對試樣壓縮破壞的破裂情況進行了分析研究。結(jié)果表明,在含蠟量較小時,砂蠟的單軸抗壓強度與蠟含量基本呈線性關(guān)系。而循環(huán)加載情況下,抗壓強度變化不大;含蠟量高的砂蠟強度較大而變形較小,隨著蠟含量的升高,砂蠟的割線模量E_(50)和彈性模量Et都增大,砂蠟試樣的泊松比也呈現(xiàn)出上升趨勢;砂蠟試樣與煤巖試樣相同,單軸壓縮變形破壞形式也表現(xiàn)為復雜多變,蠟含量多(8%~14%)的砂蠟試樣中多發(fā)生A類脆性剪切破壞型、B類楔劈式破壞型,而蠟含量低(4%~6%)的砂蠟試樣破壞形式以C類擠壓粉破柔性破壞型為主。
[Abstract]:By studying the uniaxial compression test of the standard sample of sand wax mixture with different ratios, the mechanical properties of the sample were measured and analyzed, and the fracture of the specimen under compression failure was studied. The results show that the uniaxial compressive strength of sand wax has a linear relationship with wax content when the wax content is small. However, under cyclic loading, the compressive strength of sand wax with high wax content is larger and the deformation is smaller. With the increase of wax content, the shear modulus E _ (50) and elastic modulus (Et) of sand wax increase, and the shear modulus E _ (50) and elastic modulus (Et) of sand wax increase with the increase of wax content. The Poisson's ratio of sand wax sample also shows an upward trend, and the sand wax sample is the same as the coal sample, and the failure form of uniaxial compression deformation is complex and changeable. In sand wax samples with high wax content (8% and 14%), A type brittle shear failure type and B type wedge type failure type occur, while the failure form of sand wax sample with low wax content (4%) is mainly type C extrusion powder breaking flexible failure type.
【作者單位】： 金陵科技學院建筑工程學院;蘇交科集團股份有限責任公司;
【基金】：住房和城鄉(xiāng)建設(shè)部2016年科學技術(shù)項目(2016-R3-020) 金陵科技學院校級科研基金(jit-2016-jlxm-16)
【分類號】：TB303;TD82
本文編號：2243605
[Abstract]:By studying the uniaxial compression test of the standard sample of sand wax mixture with different ratios, the mechanical properties of the sample were measured and analyzed, and the fracture of the specimen under compression failure was studied. The results show that the uniaxial compressive strength of sand wax has a linear relationship with wax content when the wax content is small. However, under cyclic loading, the compressive strength of sand wax with high wax content is larger and the deformation is smaller. With the increase of wax content, the shear modulus E _ (50) and elastic modulus (Et) of sand wax increase, and the shear modulus E _ (50) and elastic modulus (Et) of sand wax increase with the increase of wax content. The Poisson's ratio of sand wax sample also shows an upward trend, and the sand wax sample is the same as the coal sample, and the failure form of uniaxial compression deformation is complex and changeable. In sand wax samples with high wax content (8% and 14%), A type brittle shear failure type and B type wedge type failure type occur, while the failure form of sand wax sample with low wax content (4%) is mainly type C extrusion powder breaking flexible failure type.
【作者單位】： 金陵科技學院建筑工程學院;蘇交科集團股份有限責任公司;
【基金】：住房和城鄉(xiāng)建設(shè)部2016年科學技術(shù)項目(2016-R3-020) 金陵科技學院校級科研基金(jit-2016-jlxm-16)
【分類號】：TB303;TD82
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